Framing-tool.



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FRAMING TOOL.

APPLICATION FILED OCT. 2. 1914.

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TED sTaTEs PATENT oEEioE.

WILLIAM ZURICH, OF PRINCETON, NEW JERSEY.

FRAMING-TOOL.

y To all whom t may concern:

Be it known that I, WILLIAM ZURICH, a subject of the Queen of the Netherlands, having declared my intention of becoming a citizen of the United States, residing at Princeton, in the county of Mercer and State of New Jersey, have invented new and useful Improvements in 'Framing-Tools, of which the following is a specification.

The invention relates to a Vframing tool, and more particularly tothe class 0f pro,- tractors.

The primary object of the invention is the provision of a device of this character wherein the user can determine with accu-V racy the true line of cut of hip or vvalley rafters, jack rafters or the like, and the length thereof, in accordance with lthe run orwidth cfa building, the faces of the protracto-r or device being marked with scales.

and lines indicative of different pitches with tabulations to enable the framing of "therafters with accuracy correspondingly with respect to the run or width `of a building under construction.

.Another object of the'invention is the pr vision of a protractor or device of this charactor wherein the' scales, lines and tabula'- tions are arranged in a novel manner to enable a user to reckon with accuracy the framing of rafters without necessitating mental calculation for the true framing of the vrafters for the construction of a building.

.Afurther object of the invention is the provision of a protractor or device of this character which is simple in construction, reliable and handy in use, and inexpensive in manufacture. v

With these and other objects in view, the invention consists in the construction, coinbination and arrangement of parts as will be hereinafter fully described, illustrated in the accompanying drawing, and pointed out A in the claim hereunto appended. y

In the drawing Figure l is va plan view of a protractor constructed in accordance with the invention, looking toward one face thereof. Fig. 'E2 is asimilar view, looking toward the opposite face. Fig. 3 is an edge elevation.

Similar reference. characters indicate corresponding parts throughout the several views in the drawing..

Referring to the drawing in detail, the protractor or device comprises a rectangular Speccaton of Letters Patent. 'i vPgjltenlged Apr, 11, 1916, Application ledOctber 2, 1914'. Serial'No. 864,671. y

shaped plate 5, preferably made from metal,

vone face thereof being marked to indicate Arranged between the arms of the squares Y Y A and B centrally of the plate are series of longitudinal and transverse lines arranged in spaced parallel relation to eachother in each seriesI toy form therebetweenv rows of spaces 8 in which are located numerals and fractions thereof indicativeof a table of measurement, while at one end of all of the rows 'of spaces 8 is a caption Diff J. R, which designates different jack rafters, while the areas'of the squares A and B are marked with angularly disposed lines 9, and a scale of fractions therebetween, so that these lines will enable the accurate determination of different pitches of rafters when the vsaine arel to `be .cut for the framing thereof in the construction of a building. v

.Atthe ends of each square are the captions S CQJ. R, and P. C. C. 1%., which are the capitalV letters of the names ofthe va-l rious rafters andl cutsused in framing a building, or edifice, such as side cuts, com-V mon, hip, valley and jack rafters, as .Well as the pitch thereof forthe lining of the same to enable the accurate cutting thereof prior to the framing of such rafters.. At the margin of thel squares A and B throughout the length of the Varms thereof are nu-` merals and fractions thereof which coperate Vwith the lines 9 to enable the user of the device to determine the length of such rafters, while the edges of the plate 5 will give the proper cutl according to the pitch thereof.VV The plate 5 on Athe other face thereof is marked with lines to form tabulation spaces indicative of independent tais headed withfthek caption Length ]l.V &1

Located above-the caption Vof the table 10 isa row of transverse spaces 12, while in the Vleft-hand space of this row is lthe word Run, while in thel remaining spaces llO of the said row are numerals ranging from l 2 to l2 consecutively, the spaces containing the numerals being in alinement with the spaces of the tables 10 and l1, thereby enabling the user of the device to determine the lengths of the common and hip or valley rafters. By the use of the face of the plate 5 containing the tables 10 and l1 and the spaces l2 the user can determine the lengths of common and hip or valley rafters, in correspondence to the different runs, pitches and the rises thereof. Now, in the use of the device, by reference to the other side of the plate 5, containing the squares A and B, pitch lines and scales, the lengths of jack rafters, plumbs andside cuts, as well as the same with the common rafters or valley rafters can be taken with accuracy.

It will be apparent that the tables l0 and ll show scales for determining the different lengths of common, hip and valley rafters, while the table l() is headed with a row of numbers ranging from 2 to l2 consecutively, which are indicative of the different runs of one-half of the width of a building to be constructed. .Y

ln the use of the protractor for the framing of a roof, assuming that it is desired to lay out a common rafter for a roof oneeighth or three inches to a foot pitch for a building twenty-four feet wide which has ay ten foot run, it is necessary for the user of the protractor to locate the one-eighth or three inch scale to a foot run at the left hand side ofthe common rafter table l0 and after doing this the scale in this row one-eighth pitch, to obtain the length of thel common rafter the user of the protractor observes the twelve foot run which will indicate at the right hand side of the table l0 twelve feet four inches, and also observation is made of the four foot run which, in the first row of the table 10, indicates four feet, one and three-eighths, and these` two are added together, which will give sixteen feet and three-eighths, which is the length of the common rafter. For a one foot run it is necessary to use the twelve foot run on the table 10 and in this event the user reckons by inches instead of byY feet. For example, a one-eighth pitch roof, twelve feet siX inches run in this table, it will be observed with a run 1Q there will be Lfound twelve feet, four inches, and under run siX will be reckoned and two-twelfths inches and not six feet, two inches, because it is a six inch run instead of a six foot run. For eX- ample, a twelve foot, four inch run plus six and two-twelfths inches would equal twelve feet, ten and two-twelfths inches which is the length of the rafter.

ln determining the length of hip and val ley rafters the table 11 is employed and the same reckoned correspondingly to the measurements of the common rafters. To obtain lengths of jack rafters the table or scale on the reverse side of the protractor is used. rlhe first row of figures on the top will give the different spaces of jack and cripple rafters, while the figures on the left hand side will give the different pitches, it being necessary to follow the figures on the given pitch toward the right hand side until the given pitch space has been reached where it will indicate how much shorter to cut each rafter.

To frame a jack rafter for a roof oneeighth pitch space twenty inches at center, find one-eighth pitch on left hand side of the jaclr rafter table, follow the row of gures to the right hand side until the numeral 2O has been reached at the top of this table and in the vertical row there will be found one foot, eight and one-half inches which is the difference in length of jack rafter.

From the foregoing it is thought that the construction and manner of use of the device will be clearly understood, and therefore a more extended explanation has been ornitted.

lV hat is claimed is A framing tool comprising a rectangular shaped plate having one face laid off to 4form reversely disposed squares, the arms of which are parallel with each other, a table or scale columns disposed between a pair of the parallel arms of the plate and having scale indicia indicativeof the difference in the length of j ack rafters, said squares having markers within the areas thereof indicative of pitches of side cuts, plumbs, and common, hip, valley and ack rafters.

In testimony whereof l afliX my signature in presence of two witnesses.

lUVILLIAVI ZU RICH.

y Vitnesses:

HENRY VVARMERDAM, ADRIANUS DE ZWART.

Copies of this patentmay be obtained for ve cents each, by addressing theommssioner of Patents, Washington, D. C. 

